AG13 LR44 alkaline batteries are 1.5V button cells commonly used in small electronics like watches, calculators, and medical devices. These 20-pack sets provide long-lasting power with a shelf life of up to 5 years. They feature a stable voltage output and leak-resistant design, making them ideal for low-drain devices requiring consistent energy delivery.
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How Are AG13 and LR44 Batteries Different from Other Button Cells?
AG13 and LR44 are interchangeable names for the same battery type, unlike alternatives like SR44 (silver oxide) or CR2032 (lithium). Their alkaline chemistry offers cost-effective performance for moderate-energy devices, while silver oxide variants provide higher capacity for high-drain applications. Key identifiers include dimensions (11.6mm diameter x 5.4mm height) and standardized terminal designs.
Alkaline AG13/LR44 cells maintain a more stable voltage curve compared to lithium counterparts during mid-discharge cycles. This makes them preferable for analog devices like blood pressure monitors where voltage fluctuations could impact accuracy. However, their capacity (typically 110-150mAh) falls short of silver oxide batteries (170-200mAh), making the latter better suited for digital thermometers requiring continuous operation.
| Battery Type | Chemistry | Capacity | Best For |
|---|---|---|---|
| AG13/LR44 | Alkaline | 110-150mAh | Clocks, remotes |
| SR44 | Silver Oxide | 170-200mAh | Medical devices |
| CR2032 | Lithium | 220mAh | Motherboards |
How Do Temperature Conditions Affect Battery Performance?
Extreme temperatures degrade AG13/LR44 performance. Below 0°C, chemical reactions slow, reducing output. Above 40°C, accelerated self-discharge occurs. Ideal operating range is 10-30°C. In medical devices like thermometers, cold environments may require insulation around battery compartments. Manufacturers often specify temperature ratings in technical documentation.
Prolonged exposure to high humidity (above 80% RH) can compromise the battery seal integrity, leading to premature failure. Field tests show that at 35°C/90% RH, AG13 cells lose 15% more capacity monthly compared to controlled environments. For cold climate applications, lithium variants perform better but cost 3x more. Users in tropical regions should prioritize fresh stock and check expiration dates more frequently.
“The AG13/LR44’s dominance stems from its balance of energy density and safety profile. While newer chemistries emerge, alkaline remains king for general-purpose button cells. Our stress tests show name-brand variants outperform generics in high-humidity conditions by 40% lifespan—a critical factor in medical applications.”
— Senior Power Systems Engineer, Global Battery Manufacturer
Where Can Consumers Buy Authentic AG13 LR44 Batteries?
Reputable sources include electronics retailers (Best Buy, Fry’s), pharmacies (CVS, Walgreens), and online marketplaces (Amazon, BatteryJunction). Verify authenticity through UL certification marks and batch codes. Counterfeit batteries often omit safety features—purchase from brands like Energizer, Duracell, or Panasonic for guaranteed quality.
Online purchases require extra vigilance—genuine batteries feature laser-etched logos rather than stickers, and have consistent terminal finishes. A 2023 market analysis revealed 18% of third-party marketplace listings sold counterfeit cells. For bulk purchases, authorized distributors provide certificates of authenticity and proper storage documentation. Always check for child-resistant packaging, which most reputable manufacturers use as standard.
FAQ
- Are AG13 and LR44 batteries identical?
- Yes—AG13 (IEC designation) and LR44 (ANSI designation) refer to the same alkaline battery type with identical dimensions (11.6mm x 5.4mm) and electrical specifications.
- Can I use LR44 instead of SR44?
- While physically compatible, SR44 silver oxide batteries have higher capacity (150mAh vs 110mAh) and slightly different voltage curve. Only substitute if device manual permits—some precision instruments require silver oxide’s stable discharge.
- How to test AG13 battery voltage?
- Use a multimeter set to DC voltage. Place red probe on positive terminal (flat side), black on negative (textured side). Fresh batteries read 1.5-1.6V. Replace if below 1.3V under load.